Water tank



FIG. 1 is a perspective view of a water tank showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is an exploded perspective view thereof;

FIG. 9 is a sectional view thereof taken along the line 9-9 in FIG. 1; and,

FIG. 10 is a reference view thereof when installed in a refrigerator.

The broken lines are for the purpose of illustrating an environmental structure when in use. 

CLAIM The ornamental design for a water tank, as shown and described. 